Document And Entity Information - shares	9 Months Ended
	Sep. 29, 2024	Nov. 05, 2024
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 29, 2024
Document Transition Report	false
Entity File Number	001-36704
Entity Registrant Name	BGSF, INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-0656684
Entity Address, Address Line One	5850 Granite Parkway, Suite 730
Entity Address, City or Town	Plano
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	75024
City Area Code	972
Local Phone Number	692-2400
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Common Stock
Trading Symbol	BGSF
Security Exchange Name	NYSE
Entity Common Stock, Shares Outstanding		11,024,013
Entity Central Index Key	0001474903
Current Fiscal Year End Date	--12-29
Amendment Flag	false
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2024